31% of all college students major in STEM (Science, Technology, Engineering, and Math). If 40 college students are randomly selected, find the probability that a. Exactly 13 of them major in STEM. C] b. At most 12 of them major in STEM. c. At least 13 of them major in STEM. C] d. Between 10 and 17 (including 10 and 17) of them major in STEM. C]